/*
 * Copyright 2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.androidpn.server.xmpp.presence;

import org.androidpn.server.model.User;
import org.androidpn.server.xmpp.session.ClientSession;
import org.androidpn.server.xmpp.session.SessionManager;
import org.xmpp.packet.Presence;

/** 
 * Class desciption here.
 *
 * @author Sehwan Noh (sehnoh@gmail.com)
 */
public class PresenceManager {

    private SessionManager sessionManager;

    public PresenceManager() {
        sessionManager = SessionManager.getInstance();
    }

    public boolean isAvailable(User user) {
        return sessionManager.getSession(user.getUsername()) != null;
    }

    public Presence getPresence(User user) {
        if (user == null) {
            return null;
        }
        Presence presence = null;
        ClientSession session = sessionManager.getSession(user.getUsername());
        if (session != null) {
            presence = session.getPresence();
        }
        return presence;
    }

}
